/*
    Copyright 2006 Andrew Wilkinson <andrew@indiegigs.co.uk>

    This file is part of GL2x.

    GL2x is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    GL2x is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with GL2x; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#define GLCLIENT
#include "gl_internal.h"

void glAlphaFunc(GLenum func, GLclampf ref) {
    if(current_state->begin) {
        current_state->error = GL_INVALID_OPERATION;
        return;
    }

    switch(func) {
    case GL_NEVER:
    case GL_LESS:
    case GL_EQUAL:
    case GL_LEQUAL:
    case GL_GREATER:
    case GL_NOTEQUAL:
    case GL_GEQUAL:
    case GL_ALWAYS:
        break;
    default:
        current_state->error = GL_INVALID_ENUM;
        return;
    }

    void* vals = GP2x_upper_memory_malloc(sizeof(GLenum)+sizeof(GLclampf));
    *((GLenum*)vals) = func;
    *((GLclampf*)(vals + sizeof(GLenum))) = ref;
    GP2x_postMessage(SET_ALPHA_FUNC, (unsigned long)vals, 0);
}
